The fabrication yard has equipment and personnel necessary to received and store materials, to pre-fabricate, fabricate, erection, blasting and painting to perform pre-commissioning and load-out offshore Platforms, Decks, Jackets, Modules, Steel Structures and Process Equipment for energy related and Industrial plant project.

Office Facilities

Two buildings with three levels each, with total area 3.800 m2 are available for fabrication yard main office and client representative office.

There are also offices located in various areas of the fabrication yard for fabrication, erection, assembly, maintenance, blasting, painting, warehouse and others.

Fabrication Shops

There are several fabrication shops with total are + 12,500 SQM, complete with equipment to fabricate of pipe spools, assembly of pressure vessels, skid mounted process equipment, electrical and instrumentation.

The area of each Shop as follows:

1. Fabrication Shop 1 : 90 x 16 SQM
2. Fabrication Shop 2 : 90 x 30 SQM
3. Fabrication Shop 3 : 54 x 26 SQM
4. Fabrication Shop 5 : 140 x 30 SQM plus 84 x 17 SQM
5. Fabrication Shop 6 : 55 x 24 SQM
6. Portable Shops.

Equipment in this area as follows:

  • Automatic pipe cutting / beveling machine.
  • Automatic plate cutting / beveling machine.
  • 1 ton cranes with 20 ft radius.
  • Overhead cranes which can run along the whole shop length, with various capacity (5 ton, 10 ton, and 40 ton)
  • Abrasive cut-off machines
  • Overhead traveling cranes which can run along and across the whole of shop
  • 600 Amp welding machines for welding up to 42 inch diameter spools.
  • 1000 Amp welding machines
  • Automatic plate cutting machines
  • Rolling Machines up to 40 mm thickness and 3,000 mm width capacity.

Miscellaneous Shops

One of miscellaneous shops which area of 2400 SQM for cutting and profil

Warehouse Area

There are 2 (two) covered warehouse which has on overall surface in the total area 2,012 SQM. 1 (one) warehouse at inside of gate-2 and the other one is at yard-2. Both warehouses are available as customs bonded warehouse:

1. Warehouse-1 at inside of yard-1 = 20 x 41 SQM (1 bay)
2. Warehouse-2 at inside of yard-2 = 52 x 54 SQM (3 bays)

Material Storage Area

The Customs bonded steel material open storage is approx. 176,559 SQM and has able space for storage of both Client (s) and Contractors materials. The open storage area is split into 2 locations:

Open storage inside yard-1
Open storage inside yard-2

Material Handling

All workshops are equipped with various capacity of overhead traveling cranes.PTG has own traveling cranes to support the construction activities at open area, i.e.:

  • 1 units Crawler Crane 250 ton capacity,
  • 2 units Crawler Crane 150 ton capacity,
  • 4 units Rough Terrain Crane 45 ton capacity,
  • 2 units Rough Terrain Crane 25 ton capacity,
  • 2 units Truck Mounted Boom Hoist 5 ton capacity.

It is possible to rent from local crane Rental Company.

Working Tables

There are 2 (two) units working table with the following dimension:

1. Working table-1 at inside yard-1 = 20x48m
2. Working table-2 at inside yard-2 = 2@15x30m

In which generally to be used for assembly of deck section and pre-fabrication of beams and branches.


There are 2 (two) jetties which is used for load-out of structures and most of the offloading and loading of material. The jetty-1 has a bulkhead 106m (length) x 15m (width) and minimum water depth of (-) 7.5m from chart datum. The jetty-2 has a bulkhead 80m (length) x 15m (width) and minimum water depth of (-) 7m from chart datum.

The jetties were designed for distribution load for 500T/m for the 1st of 4m from jetty tip, 400T/m for the 2nd of 4m, 350T/m for the 3rd of 5m and 250T/m along the skid-way.

The minimum water depth at the load-out jetty is (-) 7 up to (-) 7.5m from chart datum and is at least this depth through natural channels leading to the open sea. There is no problem (obstructions, overhead clearance, and bends, channel widths or water depths) in bringing with the structures from the fabrication yard.

Load Out System

The skid-ways were designed for skidding load-out method with skid-way spacing 12.19m/20m at jetty-1 and 15.2m at jetty-2. The bulkhead were build at jetty tip to allow for loading/unloading activity with the capacity for bearing load up to 25 Ton/m2.

The skid-ways are 1.2m (width) x 1.5m (depth) embedded, spaced at 12.19m & 20.00m (skid-way jetty-1) and 15.35m (skid-way jetty-2) center to center. The length of skid-way jetty-1 is 300m and 153m for jetty-2 and both jetty facing to open sea. Along the skid-ways there are electrical outlets for 380 V rectifier-welding machines and compressed air outlets.

The structure/modules can be fabricated in the skid-way up to 100m length and for weighing the structure up to 15.000Te.

Beside skid-way system, the multi-wheel method and the lifting method also possible to use for load-out system at GUNANUSA Fabrication Yard.

Blasting & Painting Area

This area is mainly used for blasting and priming works, the final painting work is done wherever it is convenient. Equipment in this area consists of:

  • Air Compressors with total capacity 750 CFM.
  • Blasting Equipment.

The area of blasting & painting as the follows :

  • Manual blasting / Painting Open Area : 8,000 SQM
  • Manual Blasting Indoor Area : 1,800 SQM

Equipment in this area as follows:

  • Air compressors with 750 CFM capacity per unit
  • Completed sets of blasting equipment

In additional, there are 6 (six) Clemco Post available for use where required. Besides above area, there is one Thermal Spray Almunium (TSA) Coating area (1000 SQM) complete with equipment.

Welding School

The welding school is available for training and examination of ability all the welder before working in project, so that the project could be finish with the best quality and on time schedule it is also a Welding facility for making PQR (Procedure Qualification Record) and WPS (Welding Procedure Specification).

Power Supply

Total supply capacity is 1,730 KVA from PLN Power source and main generator house supplying 2,100 KVA. Fabrication Yard power is distributed from the main powerhouse with 20,000 volt underground distribution system to the each power house.

This power distribution area:

  • 1,000 KVA transformers at PH # 1.
  • 2,000 KVA transformers at PH # 2.
  • 800 KVA transformers at PH # 3.

There are 2 x 500 KVA, 1 x 550 KVA, 2 x 200 KVA and 1 x 150 KVA Emergency Generators, which available to supply power where, required.

Generator Area

The generators produce 380/220 Volt, 50 Hz, Power equipment located in this area consists of:

  • 150 KVA generating sets
  • 550 KVA generating sets
  • 500 KVA generating sets
  • 200 KVA generating sets
  • 1,730 KVA substation for PLN Connections
  • Paralleling & Switchgear
  • 156,000 Liter. Fuel Storage Tank

Yard Lighting System

The yard lighting consists of:

  • 18 M high tower with 4 - 1500 watt halogen lamps each
  • 2 M high tower with 1 - 1000 watt halogen lamps each
  • 2 M high tower with 1 - 1500 watt halogen lamps each
  • 1.5 M high Spot light 1000 watt lamps.
  • 1.5 M high Spot light 1000 watt lamps.

Repair and Maintenance Area

The area designated for repair and maintenance houses the machine shop, electrical shop, tire & body repair shop and offices. The open area consists of wash & lubrication racks equipment repair & overhaul facilities and diesel fuel & gasoline storage facilities.

In additional to the standard tools the Machines shop is equipment with:

  • 13 in. long bed lathe
  • Vertical milling machine
  • Extra large vertical drill press
  • 24 in power hack saw

The electrical shop has the usual electrical maintenance tools

Security System

PTG security is operated by a team of 30 security guards and one Chief Security and allows for a 24-hour shift operation covering 13 check stations.

The yard area some 176,559 SQM is protected from public access by a security brick wall 3 M high and constructed of steel pipes with plastic covered wire mesh. There are unfenced boundaries but these are secured by the sea front. Paint and Oxy-acetylene bottle are sparely housed in a secure fenced are within the yard.

A 24 hour watch is maintained at the main gates access to the yard is gained only after the security officer has obtained signed authorization from management for each and every request to enter.


Rest area and accommodation room of employees with a capacity of approximately 500 employees, equipped with locker space for 500 employees.

In addition, we have also mess area has several rooms which can house up to 120 single status personnel and provides cover for the amenities of kitchen, laundry, mess hall, video lounge, canteen client and recreation rooms.

Clinic and Ambulance

Clinic with the doctor, paramedic and ambulance are available at GUNANUSA Fabrication Yard for first aid of accident during fabrication and construction.